Body weight exercises
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Learn about this inflammatory disease that can cause some of the vertebrae in the spine to fuse over time.
Blood donation
Find out what to expect during blood donation and how your blood will be used to help others.
Different types of COVID-19 vaccines: How they work
Find out how different COVID-19 vaccines cause your body to create antibodies that will fight the COVID-19 virus.
Feminizing surgery
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Masculinizing surgery
Find out how masculinizing surgical procedures can help better align the body with a person's gender identity.
Multiple sclerosis
This nervous system disorder causes a range of symptoms — and while there's no cure, it's possible to have long periods of remission.
Video: Abdominal crunch
The abdominal crunch is a classic core-strength exercise. See how it's done.
Video: Lunge exercise
The lunge is an exercise that targets the leg muscles. See how it's done.
Video: Modified pushup
The modified pushup is less challenging than a classic pushup. See how it's done.
Video: Squat exercise
The squat is an exercise that targets the leg muscles. See how it's done.
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